Oscillating steam-engine



(No Model.)

' G. GREGORY. OSGILLATING STEAM ENGINE.

Patented Oct. 2,, 1883.;

iiI/I/i/IIl/l/I/I/Ill/11/1/1111/1/1111 111/1 7/ IIII/IIIIIIIII/IIII/[WWII]Ill/II/I/I/I u. FKTERS. mumumn u her. Washington. I16.

UNITED STATES PATENT Orricn.

GEORGE GREGORY, OF ALLEGHENY, PENNSYLVANIA.

OSCILLATING STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 285,998, dated October 2, 1883. Application filed May 24,1883. (N0 model.)

To all whom, it may concern-.-

Be it known that I, GEORGE GREGORY, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Oscillating Steam- Engines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to an improvement in oscillating steamengines; and it consists in combining with the cylinder a steanrchest and a flue for the exhaust-steam alongside of the cylinder, so arranged that the steam, after having propelled the piston, escapes from the cylinder back into one end of the steam chest that is out off by a valve, and passes through an open space between a head-cover inside of the cylinder and the head proper of the cylinder into the exhanstflue, to be discharged;

and it also consists in a crank with three throws,

of which the pentral one is attached to the pis ton-rod and the others to rods that move the cylinder back and forth, as will be fully described hereinafter.

The accompanying drawings represent my invention.

Figure 1 is a plan view of the engine; Fig. 2, a sectional viewof the cylinder, stea1n-chest, and exhaustflue; Fig. 3, a side view of the same; Fig. 4, an end view of the cylinder, steam-chest, and exhaust-flue; and Fig. 5, the crank.

A represents the cylinder, united with the steam-chest B at one side and a flue, G, for exhaust-steam, at the other, provided with trunnions D at their middle, upon which they oscillate. The trunnions are supported by wheels E, that move back and forth when the engine is in operation. In the cylinder Aare the piston b and the piston-rod 0. At both ends in the cylinder A are covers or second heads, (I, firmly attached to the walls at a short distance from the outer heads, f, leaving open spaces g be tween them. Opposite to the spaces g are ports 6 for the escape of exhaust-steam by way of the spaces 9 into the flue C. There are, aside from the ports 0, two ports, h 71 opening a communication between the steam-chest B and the cylinder A, for the admission of steam into and escape from the cylinder.

In the steam-chest B is the valve-rod t, projecting at both ends from the chest, and carrying two valves, in and it, placed in a manner that when steam is admitted under the piston through the port h the valve m cuts off steam from the port 71., but allows the steam on top of the piston to escape through port h into the steam-chest, and thence through the port 6 and open space 9 into the flue 0. Thus steam enters into the cylinder at one end, and is expelled therefrom through the same port by which it entered.

Alongside of the steam-chest B and of the flue C are tubes F and F, of which F conducts the steam introduced at 8 through trunnion D into the steam-chest, and F receives the exhaust-steam from the tube 0 through the trunnion D, to let it escape at s.

In front of the cylinder A is the crank-shaft II, with three throws, of which the central one is attached to the piston-rod c, causing the cylinder to oscillate, and thetwo at the opposite side from the former are attached to rods q, of which the other ends surround the trunnions D D. At every rotation of the crank the cylinder is drawn or pushed forward and backward by the rods q, the trunnions sliding on the stationary tubes F F, supported'on the wheels E. Opposite to the projecting ends of the valve-rod t are stops or checks consisting each of a standard, to the upper ends of which is pivoted a flat bar that reaches forward to the ground, where it is held, forming an incline more or less steep. At every rotation of the crank H, the cylinder being moved back and forth, one end of the valve-rod i strikes against the stop opposed to it and changes the position of the valves, alternately opening and closing the ports h h for the admission of steam 011 top or under the piston, but in no wise affecting the ports 0.

Having thus described my invention, I I

claim-- 7 1. In a steam-engine, the cylinder A, steamchest B, and exhaust-flue 0, cast in a single piece, substantially as shown.

2. The combination of the stea1n-cylinder A, having grooved covers placed in opposite ends, the steam-chest, and the exhaust-flue, the exhaust-steam being made to pass through the grooves in the covers into the exhaust-flue, substantially as described.

3. The combination of the cylinder A, steamchest B, theeXhaust-flueO, the grooved covers cl, placed in opposite ends of the cylinder, the ports e h h, and the valves m or upon the rod i, substantially as set forth.

- 4. The combination, with the cylinder, of the tubes F E, the trunni'ons D, and the wheels E, substantially as specified.

5. The combination of the cylinder, the tubes which receive and exhaust the steam, and which are placed upon opposite sides of the cylinder, the trunnions connected thereto, the rods q, the crank-shaft, the piston-rods c, and piston 1), whereby the same shaft is made to operate the piston at the same time that the cylinder is moved back and forth upon suit able hearings or wheels, substantially as sh own. 6. In, a steam-engine, the combination of the cylinder placed upon trunnions and supported upon suitable wheels or bearings, a crank-shaft connected with the trunnions and with the piston in .the cylinder, whereby the cylinder is made to both rock and move back and forth, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE GREGORY. Witnesses:

LoUIs MOESER, T. F. LEHMANN. 

